We are different and all our preferences, including eating are different as well. There are many eating styles one can use depending on her or his cultural tradition, subjective flavoring substances, personal habits, age and reasons of health of course. An eating style is not diet at all. It’s rather your personal preference in one or another sort of foodstuffs.
For example standard American food, as an eating style, is characterizing by emphasis on meats, eggs, dairy products, white breads, fried foods, convenience foods, processed snack foods, and sweets. Fruits and vegetables may be included, but often as a guilt-driven add-on or afterthought. This type of food as an eating style are losing greater and greater numbers of people to heart disease, cancers, diabetes, multiple sclerosis and other killers as a result.
The preference of followers of natural/ whole food is consistently toward self-prepared meals and snacks made from fresh, whole, minimally processed ingredients. They tend to eat fresh, live, raw foods and juices are esteemed highly, but variations of the natural / whole foods eating style differ on the ratios of raw to cooked foods. The goal is to eat less fat, fewer calories and this way of eating is much healthier than standard American.
There are people which are practicing the vegetarian eating which is based on abstinence from eating all forms of animal flesh. Actually there are much more variations of the vegetarian eating styles than you could suppose. Some vegetarians are junk-food junkies: they consume the SAD or low-fat SAD (see below), only minus the meat. Others are very health-conscious and eat mostly whole, natural foods along with eggs and/or dairy. For vegetarians, the line is drawn to favor those foods which do not require the killing of an animal. Vegan eating is also referred to vegetarian, but excludes all animal products entirely, including all flesh, all dairy items, all animal milks, all eggs, honey, gelatin (including gelatin capsules used for vitamins and other supplements) and any other edible thing that comes from an animal.
Also, there is well known cluster of people which could be called as chronic dieters. Their eating style is what it says. Those persons are so preoccupied with losing weight that other health concerns are exceedingly trivial. Even taste and meal enjoyment frequently lose out to weight loss efforts. Usually, a chronic dieter gains and loses weight over and over and over again, that is if they lose weight at all. Then as a rule "chronic dieter" have a wide spectrum of health problems.